Method of controlling feed axes in machine tool, and machine tool performing machining by using the method of controlling feed axes
AssigneeOkuma Corporation
InventorHiroshi Inagaki
Life of this patent
Estimating the term…
Abstract
Maximum values of actual machining allowances of a workpiece in respective cutting flutes are averaged by control amounts of respective cutting flutes calculated by an arithmetic unit. The arithmetic unit converts the calculated control amounts into an amount in each axis direction and subtracts the value from a feed axis command value in an NC program stored in a storage unit. Then, a numeral value control unit performs machining by controlling respective feed axes based on the subtracted feed axis command value.
Claims4
A method of controlling feed axes in a machine tool, wherein
- the machine tool machines a workpiece by rotating a tool, the tool including a plurality of tiers having a plurality of cutting edges arranged on concentric circles in an axis direction,
- the method comprising steps of:
- calculating increment or decrement of machining allowances of a workpiece which is actually machined by respective cutting edges based on previously measured runout amounts of the cutting edges;
- calculating control amounts to control the feed axes whereby maximum values of the machining allowances in respective cutting flutes are averaged;
- and
- superimposing control of displacing the feed axes in an opposite direction of machining while machining is performed, based on the control amounts.
A machine tool which machines a workpiece by rotating a tool which includes a plurality of tiers each having a plurality of cutting edges arranged on concentric circles in the axial direction, the machine tool comprising:
- a control value calculation unit for calculating increment or decrement of machining allowances of a workpiece which is actually machined by respective cutting edges based on previously measured runout amounts of the cutting edges and calculating control amounts to control feed axes whereby the maximum values of the machining allowances in respective cutting flutes are averaged;
- and
- a control unit for superimposing control of displacing the feed axes in an opposite direction of machining while machining is performed, based on the control amounts.
Dependencies are inferred from the claim text.